feature: Added Uno support (#2067)

README.md

@@ -298,17 +298,11 @@ ReactiveUI is part of the [.NET Foundation](https://www.dotnetfoundation.org/).
 <table>
   <tbody>
     <tr>
-      <td align="center" valign="top">
-        <img width="100" height="100" src="https://github.com/ghuntley.png?s=150">
-        <br>
-        <a href="https://github.com/ghuntley">Geoffrey Huntley</a>
-        <p>Sydney, Australia</p>
-      </td>
       <td align="center" valign="top">
         <img width="100" height="100" src="https://github.com/glennawatson.png?s=150">
         <br>
         <a href="https://github.com/glennawatson">Glenn Watson</a>
-        <p>Washington, USA</p>
+        <p>Melbourne, Australia</p>
       </td>
       <td align="center" valign="top">
         <img width="100" height="100" src="https://github.com/rlittlesii.png?s=150">
@@ -339,6 +333,12 @@ The following have been core team members in the past.
 <table>
   <tbody>
     <tr>
+      <td align="center" valign="top">
+        <img width="100" height="100" src="https://github.com/ghuntley.png?s=150">
+        <br>
+        <a href="https://github.com/ghuntley">Geoffrey Huntley</a>
+        <p>Sydney, Australia</p>
+      </td>
       <td align="center" valign="top">
         <img width="100" height="100" src="https://github.com/kentcb.png?s=150">
         <br>

build.cake

@@ -24,6 +24,7 @@ var packageWhitelist = new List<FilePath>
     MakeAbsolute(File("./src/ReactiveUI.Fody.Helpers/ReactiveUI.Fody.Helpers.csproj")),
     MakeAbsolute(File("./src/ReactiveUI.AndroidSupport/ReactiveUI.AndroidSupport.csproj")),
     MakeAbsolute(File("./src/ReactiveUI.XamForms/ReactiveUI.XamForms.csproj")),
+    MakeAbsolute(File("./src/ReactiveUI.Uno/ReactiveUI.Uno.csproj")),
 };
 
 if (IsRunningOnWindows())

src/Directory.build.props

@@ -41,22 +41,22 @@
   </PropertyGroup>
 
   <ItemGroup Condition="$(IsTestProject)">
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.1.1" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.console" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
     <PackageReference Include="Xunit.StaFact" Version="0.3.18" />
     <PackageReference Include="Shouldly" Version="4.0.0-beta0002" />
     <PackageReference Include="Microsoft.Reactive.Testing" Version="4.1.5" />
-    <PackageReference Include="PublicApiGenerator" Version="9.0.0" />
+    <PackageReference Include="PublicApiGenerator" Version="9.1.0" />
   </ItemGroup>
 
   <ItemGroup Condition="$(IsTestProject)">
     <Compile Include="$(MSBuildThisFileDirectory)ApiGeneratorGlobalSuppressions.cs" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(IsTestProject)' != 'true' and '$(SourceLinkEnabled)' != 'false'">
-    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-19270-01" PrivateAssets="All" /> 
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0-beta2-19351-01" PrivateAssets="All" /> 
   </ItemGroup>
 
    <PropertyGroup>
@@ -74,7 +74,7 @@
   <ItemGroup>
     <PackageReference Include="stylecop.analyzers" Version="1.1.118" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.6.3" PrivateAssets="all" />
-    <PackageReference Include="Roslynator.Analyzers" Version="2.1.0-rc" PrivateAssets="All" />
+    <PackageReference Include="Roslynator.Analyzers" Version="2.1.0" PrivateAssets="All" />
     <PackageReference Condition="'$(OS)' == 'Windows_NT'" Include="Microsoft.CodeAnalysis.FxCopAnalyzers" Version="2.9.3" PrivateAssets="all" />
   </ItemGroup>
   <ItemGroup>

src/ReactiveUI.AndroidSupport/ControlFetcherMixin.cs

@@ -26,6 +26,11 @@ public static class ControlFetcherMixin
         /// <param name="resolveMembers">The resolve members.</param>
         public static void WireUpControls(this Fragment fragment, View inflatedView, ResolveStrategy resolveMembers = ResolveStrategy.Implicit)
         {
+            if (fragment == null)
+            {
+                throw new ArgumentNullException(nameof(fragment));
+            }
+
             var members = fragment.GetWireUpMembers(resolveMembers);
 
             foreach (var member in members)

src/ReactiveUI.AndroidSupport/ReactivePagerAdapter.cs

@@ -81,9 +81,23 @@ public override Object InstantiateItem(ViewGroup container, int position)
         }
 
         /// <inheritdoc/>
-        public override void DestroyItem(ViewGroup container, int position, Object @object)
+        public override void DestroyItem(ViewGroup container, int position, Object item)
         {
-            var view = (View)@object;
+            if (container == null)
+            {
+                throw new ArgumentNullException(nameof(container));
+            }
+
+            if (item == null)
+            {
+                throw new ArgumentNullException(nameof(item));
+            }
+
+            if (!(item is View view))
+            {
+                throw new ArgumentException("Item must be of type View", nameof(item));
+            }
+
             container.RemoveView(view);
         }
 

src/ReactiveUI.AndroidSupport/ReactiveRecyclerViewAdapter.cs

@@ -73,7 +73,17 @@ public virtual int GetItemViewType(int position, TViewModel viewModel)
         /// <inheritdoc/>
         public override void OnBindViewHolder(RecyclerView.ViewHolder holder, int position)
         {
-            ((IViewFor)holder).ViewModel = GetViewModelByPosition(position);
+            if (holder == null)
+            {
+                throw new ArgumentNullException(nameof(holder));
+            }
+
+            if (!(holder is IViewFor viewForHolder))
+            {
+                throw new ArgumentException("Holder must be derived from IViewFor", nameof(holder));
+            }
+
+            viewForHolder.ViewModel = GetViewModelByPosition(position);
         }
 
         /// <inheritdoc/>

src/ReactiveUI.AndroidSupport/ReactiveUI.AndroidSupport.csproj

@@ -4,6 +4,7 @@
     <TargetFrameworks>MonoAndroid81</TargetFrameworks>
     <Description>ReactiveUI extensions for the Android Support Library</Description>
     <PackageId>ReactiveUI.AndroidSupport</PackageId>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>

src/ReactiveUI.Blend/FollowObservableStateBehavior.cs

@@ -89,17 +89,26 @@ public FrameworkElement TargetObject
         /// <param name="e">The <see cref="DependencyPropertyChangedEventArgs"/> instance containing the event data.</param>
         protected static void OnStateObservableChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
         {
-            var @this = (FollowObservableStateBehavior)sender;
-            if (@this._watcher != null)
+            if (e == null)
             {
-                @this._watcher.Dispose();
-                @this._watcher = null;
+                throw new ArgumentNullException(nameof(e));
             }
 
-            @this._watcher = ((IObservable<string>)e.NewValue).ObserveOn(RxApp.MainThreadScheduler).Subscribe(
+            if (!(sender is FollowObservableStateBehavior item))
+            {
+                throw new ArgumentException("Sender must be of type " + nameof(FollowObservableStateBehavior), nameof(sender));
+            }
+
+            if (item._watcher != null)
+            {
+                item._watcher.Dispose();
+                item._watcher = null;
+            }
+
+            item._watcher = ((IObservable<string>)e.NewValue).ObserveOn(RxApp.MainThreadScheduler).Subscribe(
                 x =>
                 {
-                    var target = @this.TargetObject ?? @this.AssociatedObject;
+                    var target = item.TargetObject ?? item.AssociatedObject;
 #if NETFX_CORE
                     VisualStateManager.GoToState(target, x, true);
 #else
@@ -115,12 +124,12 @@ protected static void OnStateObservableChanged(DependencyObject sender, Dependen
                 },
                 ex =>
                 {
-                    if (!@this.AutoResubscribeOnError)
+                    if (!item.AutoResubscribeOnError)
                     {
                         return;
                     }
 
-                    OnStateObservableChanged(@this, e);
+                    OnStateObservableChanged(item, e);
                 });
         }
 

src/ReactiveUI.Blend/Platforms/net461/ObservableTrigger.cs

@@ -47,7 +47,11 @@ public IObservable<object> Observable
         /// <param name="e">The <see cref="DependencyPropertyChangedEventArgs"/> instance containing the event data.</param>
         protected static void OnObservableChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
         {
-            ObservableTrigger triggerItem = (ObservableTrigger)sender;
+            if (!(sender is ObservableTrigger triggerItem))
+            {
+                throw new ArgumentException("Sender must be of type " + nameof(ObservableTrigger), nameof(sender));
+            }
+
             if (triggerItem._watcher != null)
             {
                 triggerItem._watcher.Dispose();

src/ReactiveUI.Blend/ReactiveUI.Blend.csproj

@@ -6,6 +6,7 @@
     <RootNamespace>ReactiveUI.Blend</RootNamespace>
     <Description>Blend behaviors for ReactiveUI</Description>
     <PackageId>ReactiveUI.Blend</PackageId>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>

src/ReactiveUI.Fody.Helpers/ObservableAsPropertyExtensions.cs

@@ -20,7 +20,7 @@ public static class ObservableAsPropertyExtensions
         /// </summary>
         /// <typeparam name="TObj">The type of the object.</typeparam>
         /// <typeparam name="TRet">The type of the ret.</typeparam>
-        /// <param name="this">The this.</param>
+        /// <param name="item">The observable with the return value.</param>
         /// <param name="source">The source.</param>
         /// <param name="property">The property.</param>
         /// <param name="initialValue">The initial value.</param>
@@ -32,10 +32,20 @@ public static class ObservableAsPropertyExtensions
         /// or
         /// Backing field not found for " + propertyInfo.
         /// </exception>
-        public static ObservableAsPropertyHelper<TRet> ToPropertyEx<TObj, TRet>(this IObservable<TRet> @this, TObj source, Expression<Func<TObj, TRet>> property, TRet initialValue = default(TRet), bool deferSubscription = false, IScheduler scheduler = null)
+        public static ObservableAsPropertyHelper<TRet> ToPropertyEx<TObj, TRet>(this IObservable<TRet> item, TObj source, Expression<Func<TObj, TRet>> property, TRet initialValue = default, bool deferSubscription = false, IScheduler scheduler = null)
             where TObj : ReactiveObject
         {
-            var result = @this.ToProperty(source, property, initialValue, deferSubscription, scheduler);
+            if (item == null)
+            {
+                throw new ArgumentNullException(nameof(item));
+            }
+
+            if (property == null)
+            {
+                throw new ArgumentNullException(nameof(property));
+            }
+
+            var result = item.ToProperty(source, property, initialValue, deferSubscription, scheduler);
 
             // Now assign the field via reflection.
             var propertyInfo = property.GetPropertyInfo();

src/ReactiveUI.Fody.Helpers/ReactiveUI.Fody.Helpers.csproj

@@ -11,11 +11,12 @@
 
     <!-- Due to fody insisting on having .net 4 classes, we can't pack on non-windows -->
     <IsPackable Condition=" '$(OS)' != 'Windows_NT' ">false</IsPackable>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Fody" Version="5.1.0" PrivateAssets="None" />
-    <PackageReference Include="FodyPackaging" Version="5.1.0" PrivateAssets="All" />
+    <PackageReference Include="Fody" Version="5.1.1" PrivateAssets="None" />
+    <PackageReference Include="FodyPackaging" Version="5.1.1" PrivateAssets="All" />
     <PackageReference Include="System.Reactive" Version="4.1.5" />
   </ItemGroup>
 

src/ReactiveUI.Fody.Tests/API/ApiApprovalTests.ReactiveUIFody.net461.approved.txt

@@ -13,7 +13,7 @@ namespace ReactiveUI.Fody.Helpers
     }
     public class static ObservableAsPropertyExtensions
     {
-        public static ReactiveUI.ObservableAsPropertyHelper<TRet> ToPropertyEx<TObj, TRet>(this System.IObservable<TRet> @this, TObj source, System.Linq.Expressions.Expression<System.Func<TObj, TRet>> property, TRet initialValue = null, bool deferSubscription = False, System.Reactive.Concurrency.IScheduler scheduler = null)
+        public static ReactiveUI.ObservableAsPropertyHelper<TRet> ToPropertyEx<TObj, TRet>(this System.IObservable<TRet> item, TObj source, System.Linq.Expressions.Expression<System.Func<TObj, TRet>> property, TRet initialValue = null, bool deferSubscription = False, System.Reactive.Concurrency.IScheduler scheduler = null)
             where TObj : ReactiveUI.ReactiveObject { }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Property | System.AttributeTargets.All)]

src/ReactiveUI.Fody.Tests/API/ApiApprovalTests.ReactiveUIFody.netcoreapp2.0.approved.txt

@@ -13,7 +13,7 @@ namespace ReactiveUI.Fody.Helpers
     }
     public class static ObservableAsPropertyExtensions
     {
-        public static ReactiveUI.ObservableAsPropertyHelper<TRet> ToPropertyEx<TObj, TRet>(this System.IObservable<TRet> @this, TObj source, System.Linq.Expressions.Expression<System.Func<TObj, TRet>> property, TRet initialValue = null, bool deferSubscription = False, System.Reactive.Concurrency.IScheduler scheduler = null)
+        public static ReactiveUI.ObservableAsPropertyHelper<TRet> ToPropertyEx<TObj, TRet>(this System.IObservable<TRet> item, TObj source, System.Linq.Expressions.Expression<System.Func<TObj, TRet>> property, TRet initialValue = null, bool deferSubscription = False, System.Reactive.Concurrency.IScheduler scheduler = null)
             where TObj : ReactiveUI.ReactiveObject { }
     }
     [System.AttributeUsageAttribute(System.AttributeTargets.Property | System.AttributeTargets.All)]

src/ReactiveUI.Fody.Tests/ReactiveUI.Fody.Tests.csproj

@@ -4,6 +4,7 @@
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT' ">$(TargetFrameworks);net461</TargetFrameworks>
     <FodyTargetFramework>netstandard2.0</FodyTargetFramework>
     <FodyTargetFramework Condition=" $(TargetFramework.StartsWith('net4')) ">$(TargetFramework)</FodyTargetFramework>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
   <ItemGroup>